We have a problem with iOs purchase validation, but we have any clue to resolve it. It works fine in sandbox env, but it didn't work on production env.
We note some OnPlayfabValidationError with:
ErrorMessage: HTTP/1.1 400 Bad Request ApiEndPoint: /Client/ValidateIOSReceipt HttpCode: 400 HttpStatus: BadRequest
But not errors triggered by the client.
In attach our codecapture.png